/Engine/Source/Runtime/Core/Public/Containers/BitArray.h
Returns true if Other contains all the same set bits as this, accounting for differences in length. Similar to operator== but can handle different length arrays by zero or one-filling missing bits.
true if this array matches Other, including any missing bits, false otherwise
template<typename OtherAllocator> bool CompareSetBits ( const [TBitArray](API\Runtime\Core\Containers\TBitArray)< OtherAllocator > & Other, const bool bMissingBitValue ) const